Uncertainty Principle Using ΔEΔt ≥ ħ: an Ultraviolet Source Produces

question 78

Multiple Choice

Uncertainty principle using ΔEΔt ≥ ħ: An ultraviolet source produces a monochromatic beam of 200-nm light. A shutter allows a pulse to pass that is 10,000 wavelengths long. The uncertainty in the energy of a photon in this pulse is closest to which of the following? (ħ = 1.055 × 10^-34 J ∙ s = 6.59 × 10^-16 eV ∙ s, c = 3.00 × 10⁸ m/s)

• A) 10^-6 eV
• B) 10^-5 eV
• C) 10^-4 eV
• D) 10^-3 eV
• E) 10^-2 eV

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Definitions:

Scapula

A flat, triangular-shaped bone located in the upper back that connects the humerus (upper arm bone) with the clavicle (collarbone).

Intervertebral Disk

A layer of cartilage separating adjacent vertebrae in the spine, functioning as a shock absorber and allowing flexibility and movement.

Thoracic Region

The portion of the body's trunk located between the neck and the abdomen, housing the chest organs including the heart and lungs.

Vertebra

One of the individual bones that make up the vertebral column (spine), providing structural support and protecting the spinal cord.